Israel has vowed to retaliate for Iran's recent missile attack, prompting fears of an escalating conflict and renewing focus on the military capacities of each country.

Explosions were heard over Tel Aviv and Jerusalem but there were no reports of Israeli deaths. A U.S. official said the attack was "effectively defeated."

Peter Kyle said Britain will do 'what it needs to do to support our allies in a time of need' when asked if he could rule out the UK military being involved in any attacks on Iran